Leblanc's winrate has become 5% lower
Well Iam a avid Leblanc player that played her a lot even before she became popular on the rift. If you can see around various websites, after the patch Leblanc's winrate has gone around 46 to 45% Basically they made 2 of her core skills very hard to use...to a point it is frustrating for players to use her rather than her opponents since she is a sitting target without pushing speed. Which is a bit ironic since it was the other way around Riot actually did promise a update on her if her winrates did decline, but what do you think it would be the best to buff her so she wont be toxic but still fun to play. I personally don't think riot made it right here.
(i'm still surprised they did leave the W return without delay and I think its a key part that riot will not remove, and I don't think the win rate decline is a matter of skill ratio. )